Sydney Leathers, 23, the woman at the center of the Anthony Weiner scandal, frolicking on the beach in Santa Monica, Calif.Lazic/INFphoto

An unprecedented security force – led by cops on foot and F-16s fighter jets at the ready – will guard the Yankees and Arizona Diamondbacks when they open the World Series this weekend in Phoenix, authorities said yesterday.

While stadium and law-enforcement officials would not go into great detail about policing plans, they said fans entering Bank One Ballpark will easily spot the stepped-up security.

“You’ll notice an increased presence of police officers in the street and in the ballpark,” said George Bevans, vice president of security for the downtown stadium, which will play host to Games 1 and 2 of the World Series, beginning on Saturday.

Fans also will be guarded by an army of undercover officers and watched by 106 stadium cameras that will be vigilantly monitored by cops, Bevans added.

“We can follow anyone throughout the ballpark with our camera system,” the security chief said.

Since terrorists attacked the World Trade Center and Pentagon Sept. 11, the Federal Aviation Administration has clamped down on low-flying planes in high-population areas.

So World Series staples like blimps and fixed-wing planes dragging banner ads over stadiums have been grounded.

F-16s and other military planes have been routinely patrolling the skies over major cities since Sept. 11, and those aircraft will be ready if needed this weekend.

“Before Sept. 11, you used to have a lot of stuff flying over stadiums. Those days are gone – maybe forever,” said FAA spokesman Allen Kenitzer.